Ijmb Model Questions Vol1 2025 Biology Question 1

Practice practical question 1 from the 2025 Ijmb Model Questions Vol1 Biology examination. This question covers Cell Structure .

Ijmb Model Questions Vol1 2025 Biology Practical

Topic: Cell Structure

Question 1 IJMB_MODEL_QUESTIONS_VOL1 • 2025 • BIOLOGY • practical

You are given a prepared slide of human cheek epithelial cells stained with methylene blue. Using a compound microscope equipped with an ocular micrometer calibrated at 0.01 mm per division, you measure the diameter of five randomly selected cells. The recorded diameters are: 0.058 mm, 0.062 mm, 0.060 mm, 0.059 mm and 0.061 mm. Assume the cells are approximately spherical.

Question Parts

( a )

Calculate the mean cell diameter (to three significant figures) and state the corresponding mean radius.

( b )

Assuming a spherical shape, calculate the average surface area and volume of the cells (both to two significant figures) and then compute the surface‑area‑to‑volume (SA:V) ratio.

( c )

Briefly discuss why a high surface‑area‑to‑volume ratio is advantageous for epithelial cells and list two possible sources of error in the diameter measurements.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Ijmb Model Questions Vol1 2025 Biology Question 1. It is one of the practical questions from the 2025 Ijmb Model Questions Vol1 Biology examination.

The question covers Cell Structure .

View More Ijmb Model Questions Vol1 2025 Biology Questions More Ijmb Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support